Add check for VbeModeInfo->PhysBasePtr != 0.

Modified: trunk/reactos/drivers/video/miniport/vbe/vbemp.c

--- trunk/reactos/drivers/video/miniport/vbe/vbemp.c	2005-12-13 00:02:07 UTC (rev 20138)
+++ trunk/reactos/drivers/video/miniport/vbe/vbemp.c	2005-12-13 00:17:08 UTC (rev 20139)
@@ -344,7 +344,8 @@

           VbeModeInfo->XResolution >= 640 &&
           VbeModeInfo->YResolution >= 480 &&
           (VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_PACKEDPIXEL ||

-           VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_DIRECTCOLOR))

+           VbeModeInfo->MemoryModel == VBE_MEMORYMODEL_DIRECTCOLOR) &&
+          VbeModeInfo->PhysBasePtr != 0)

       {
          if (VbeModeInfo->ModeAttributes & VBE_MODEATTR_LINEAR)
          {